

/* #div1 {
    width: 850px;
    height: 500px;
    margin: 50px auto;
    overflow: hidden;
    position: relative;
} */
#div1 {
    position: relative;
    width: 100%;
    height: 100%;
    z-index: 1;
    display: flex;
    transition-property: transform;
    box-sizing: content-box
}

#div1 ul li {
    height: 500px;
    opacity: 0;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 0;
    transition: opacity 1.5s;
}

#div1 ul li.ac {
    z-index: 5;
    opacity: 1;
}

#div1 ol {
    position: absolute;
    right: 40%;
    bottom: 10px;
    z-index: 6;
    top: 480px;
}

#div1 ol li {
    width: 20px;
    height: 20px;
    background: #fff;
    margin-left: 5px;
   
    float: left;
    line-height: 20px;
    text-align: center;
    cursor: pointer;
}

#div1 ol li.ac {
    background: red;
    color: #fff;
}

#div1>a {
    text-decoration: none;
    position: absolute;
    top: 50%;
    margin-top: 10px;
    height: 40px;
    line-height: 32px;
    text-align: center;
    width: 40px;
    font-size: 40px;
    vertical-align: middle;
    color: #fff;
    background: rgba(0, 0, 0, 0.5);
    z-index: 6;
}

#goPrev {
    left:50px;
}

#goNext {
    right: 50px;
}